Blood Circulation Basics

What is the main function of the circulatory system?

• Producing hormones

• Transporting substances throughout the body

• Regulating body temperature

• Digesting food

Which type of blood vessels carry blood away from the heart?

• Veins

• Capillaries

• Lymphatic vessels

• Arteries

What is the name of the largest artery in the human body?

• capillary

• vein

• bronchus

• aorta

What is the name of the smallest blood vessels where gas exchange occurs?

• Capillaries

• Veins

• Arteries

• Lymphatic vessels

What is the liquid part of blood called?

• plasma

• serum

• platelets

• hemoglobin

What is the average adult human blood volume?

• 3 liters

• 7 liters

• 10 liters

• 5 liters

What is the name of the upper chambers of the heart?

• Pulmonary veins

• Atria

• Ventricles

• Coronary arteries

What is the name of the lower chambers of the heart?

• atriums

• ventricles

• valves

• sinuses

What is the term for the contraction phase of the heart?

• atrium

• systole

• diastole

• ventricle

What is the term for the relaxation phase of the heart?

• relaxation

• contraction

• systole

• diastole